If the diameter of a circle is 18 inches then its radius is 18/2 = 9 inches
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Radius is 36/2 = 18 inches
36*pi inches
Circumference = 2*pi*radius or pi*diameter Circumference = 36pi inches
6 inches
Circumference = 2*pi*rr(radius) = diameter/2 = 36 in/2 = 18 inchesCircumference = 2*pi(18 inches)= 113 inches=========